I don’t think it backs economic insecurity being the primary or sole cause; which as I pointed out is clearly contradicted by the statistics. Sure, some people voted for Trump because they thought he could bring back blue-collar jobs; but what put him over the top was people who did have money, some of whom thought he’d help them get even more at the expense of the blue-collar people.
I think that education difference indicates that people with better education were better able to pick out truth from lies in the information they were getting, and/or had access to / tended to use different information sources.